Understanding Crime Statistics: Revisiting the Divergence of the Ncvs and the UcrIn Understanding Crime Statistics, Lynch and Addington draw on the work of leading experts on U. S. crime statistics to provide much needed research on appropriate use of this data. Specifically, the contributors explore the issues surrounding divergence in the Uniform Crime Reports (UCR) and the National Crime Victimization Survey (NCVS), which have been the two major indicators of the level and of the change in level of crime in the United States